Study of scalar meson a_0(980) from B→a_0(980)π decays

• 作 者: 张志清 肖振军
• 机 构: Department of Physics,Henan University of Technology,Department of Physics and Institute of Theoreti
• 出 处: 中国物理C
• 发表日期: 2010年05期
• 关键词: meson decays a_0 from B scalar branching factorization quark asymmetry currently

In this paper,we calculate the branching ratios and the direct CP-violating asymmetries for decays B0 →a00(980)π0,a0+(980)π-,a0-(980)π+ and B- →a00(980)π-,a0-(980)π0 by employing the perturbative QCD(pQCD) factorization approach at the leading order.We found that(a) the pQCD predictions for the branching ratios are around(0.4-2.8)×10-6,consistent with currently available experimental upper limits;(b) the CP asymmetries of B0 →a00(980)π0 and B- →a0-(980)π0 decays can be large,about(70-80)% for α=100-.

In this paper, we calculate the branching ratios and the direct CP-violating asymmetries for decays B0 → a00 (980) π0, a0 + (980) π-, a0- (980) π + and B- → a00 (980) , a0- (980) π0 by employing the perturbative QCD (pQCD) factorization approach at the leading order. We found that (a) the pQCD predictions for the branching ratios are around (0.4-2.8) × 10-6, (b) CP asymmetries of B0 → a00 (980) π0 and B- → a0- (980) π0 decays can be large, about (70-80)% for α = 100-.